The first row of the CSV file that contains the column titles is called the file header. An example of a basic file header with two messages to be sent:
| Phone_number | Message | Date_time | <- file header |
|---|---|---|---|
| 16175551212 | Happy New Year | 01-01-2020: 00:00 | |
| 17812221212 | Happy New Year | 01-01-2020: 00:00 |